Surge protectives device, protects against thunder surge voltages in solar system (photovoltaic powersupply system). Features: When thunder occurs, it is necessary to respond quickly and unload the voltage to prevents household appliances from being burned. Fire-proof and flameretardant materials, safer and insulation. Plug-in type design, convenient to use. Red copper accessories, ultra-thick chips, strong conductivity, not easy to rust. Large-hole threaded terminal is more compact, long service time. Specifications: Color: red Voltage: DC1000V Discharge current(8/20s): 20KA, max. 40KA Item size: 90 * 64 * 36mm / 3.5 * 2.5 * 1.4in Item weight: 184g / 6.5ounce Package size: 92 * 70 * 38mm / 3.6 * 2.8 * 1.5in Package weight: 196g / 6.9ounce Packing List: 1 * Surge Protector 1 * Arc-disconnector